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Thermal Gas Mass Flow Meter
Classification
Keywords: Thermal Gas Mass Flow Meter
- Product Description
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TMF Series Thermal Gas Mass
This flow meter is designed based on the thermal dispersion principle and employs the constant temperature difference method for gas measurement. It is unaffected by temperature, pressure or vibration and can measure gas mass flow rate, standard volumetric flow rate and flow velocity. The measurement range is 0.1-100 Nm/s, making it suitable for gas leak detection. Featuring an all-digital circuit design, it ensures high measurement accuracy and easy maintenance. With RS485 or HART communication, it enables industrial automation and system integration.
Working Principle:
There are two temperature transducers: one continuously measures th medium temperature (T1), while the other is self-heated to a temperature (T2) higher than the medium. The temperature difference ΔT = T2− T1. When fluid flow through, it carries away heat from T2. To maintain ΔT constant, the supply current to T2 must be increased. The faster the flow velocity, the more heat is removed, and there exists a fixed functional relationship between the gas flow rate and the additional heat input − this is the principle of constant temperature difference. The relationship between flow velocity and gas density is also deterministic, allowing the direct calculation of gas mass flow rate.
Key Benefits:
No moving parts, minimal wear;
Resistant to pipeline vibration;
Compact structure, easy installation & maintenance;
Long service life;
In-line installation & maintenance (customized solution).
Basic Parameters
Model Series
TMF
Housing Material
Stainless Steel
Structure Type
Integrated/Split Type (pipeline, insertion)
Installation
Flange/Welded
Nominal Pressure
Pipeline Type≤ 4.0Mpa, Insertion Type≤ 2.5Mpa
Nominal Diameter
15~300mm (Pipeline Type),
15~1200mm (Insertion Type)
Display
Digital (mass flow, volume flow, flow velocity, operation time, temperature)
Signal Output
4-20mA/Pulse/RS485 or HART
Power Supply
24VDC/220VAC（Single or Dual）
IP Rating
IP65
Explosion-proof Rating
Exd IIC T6 Gb (optional)
Medium
Gases (excluding acetylene)
Accuracy
±1~2.5%
Flow Range
0.1~120Nm/s
Medium Temperature
-40~220℃
Ambient Temperature
-20~45℃
Thermal Gas Mass Flow Meter
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Telephone: 0086-551-65661688/65663688
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